J/A+A/553/A121ivo://CDS.VizieR/J/A+A/553/A121doi:10.26093/cds/vizier.35530121CDSEulaers E.Tewes M.Magain P.Courbin F.Asfandiyarov I.,Ehgamberdiev Sh.Rathna Kumar S.Stalin C.S.Prabhu T.P.Meylan G.,Van Winckel H.2017-07-10T06:21:56Z2013-05-22T10:19:00ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frquasarsgravitational-lensingphotometryWithin the framework of the COSMOGRAIL collaboration we present 7- and 8.5-year-long light curves and time-delay estimates for two gravitationally lensed quasars: SDSS J1206+4332 and HS 2209+1914. We monitored these doubly lensed quasars in the R-band using four telescopes: the Mercator, Maidanak, Himalayan Chandra, and Euler Telescopes, together spanning a period of 7 to 8.5 observing seasons from mid-2004 to mid-2011. The photometry of the quasar images was obtained through simultaneous deconvolution of these data. The time delays were determined from these resulting light curves using four very different techniques: a dispersion method, a spline fit, a regression difference technique, and a numerical model fit. This minimizes the bias that might be introduced by the use of a single method.2013A&A...553A.121Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A121CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/488/481 : Time delays and H0 from WFI J2033-4723 (Vuissoz+, 2008)J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)J/A+A/420/447 : Lensed quasar QSO B2237+0305 VRI photometry (Vakulik+, 2004)J/A+A/455/L1 : Variability of 5 gravitationally lensed QSOs (Paraficz+, 2006)J/ApJ/662/62 : Optical monitoring of SDSS J1004+4112 (Fohlmeister+, 2007)J/A+A/528/A42 : VRi light curves of the lensed QSO HE 0435-1223 (Ricci+, 2011)J/A+A/544/A51 : Lensed quasar UM673 R-band photometry (Koptelova+, 2012)J/A+A/551/A104 : Lensed QSO UM673/Q0142-100 VRi light curves (Ricci+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A121https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A121http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A121https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A121https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A121http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A121GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/553/A121/hs2209Photometry of HS 2209+1914 as in Figure 6TelTelescope used (1)instr.setupcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian datedtime.epochdoubleRAmagRelative R magnitude of quasar component Amagpos.eq.ra;meta.maindoublee_RAmagrms uncertainty on RAmagmagstat.errordoubleRBmagRelative R magnitude of quasar component Bmagphot.mag;em.opt.Rdoublee_RBmagrms uncertainty on RBmagmagstat.error;phot.magdoubleJ/A+A/553/A121/j1206Photometry of SDSS J1206+4332 as in Figure 3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian datedtime.epochdoubleRAmagRelative R magnitude of quasar component Amagpos.eq.ra;meta.maindoublee_RAmagrms uncertainty on RAmagmagstat.errordoubleRBmagRelative R magnitude of quasar component Bmagphot.mag;em.opt.Rdoublee_RBmagrms uncertainty on RBmagmagstat.error;phot.magdoubleTelTelescope used (1)instr.setupchar